The motoring group says the trialled limit of 40km/h has “failed to show any real benefits”, with the new limit causing confusion among motorists.
The RAA says only 37 percent of its members supported the 40km/h limit during a recent survey, while only 29 percent supported a blanket 40km/h limit over a large area.
“Hutt Street is an important route into and out of the city, that’s why Adelaide City Council needs to return the speed limit to 50km/h to encourage traffic to use it,” RAA’s Charles Mountain said.
“The locations that are best suited to lower speed limits are ‘destinations’ rather than key travel routes, and locations that also have a lot of kerbside parking manoeuvres.”
Melbourne also has a blanket 40km/h speed limit for the CBD, which has been enforced around the clock since 2012.
The RAA supports a move to 40km/h in parts of Adelaide’s CBD, including Rundle Street, Hindley Street and Gouger Street.
South Australians may soon be forced to slow down outside the capital city as well, as the state Labor government took a pledge to lower rural speed limits from 110km/h to 100km/h to the recent state election.
Outside Australia, the newly-elected Mayor of Paris, Madame Anne Hidalgo, is proposing a blanket 30km/h speed limit, covering almost the entire city.
France is considered by many to have some of the best roads in Europe, with most of its rural motorways blessed with a 130km/h limit.